Pulley system -- Calculate the mass that balances this pulley system

[FFTB]

Homework Statement:

Calculate the mass of mB that makes the system to be in equilibrium. Neglect the possible friction

Relevant Equations:

Sin cos tan

I've been stuck at this pulley system for a while.
I've calculated the force of which A pulls => FA = sin25*50*9.82 = 208.5 N
But I get stuck on the free body diagram.
Can someone help and explain the freebody diagram

 

[Chestermiller]

Let T be the tension in the rope. Does it vary along the rope? What is the tension force on mass A? On mass B?

 

[haruspex]

Your work looks ok except for $m_B=T$. What have you missed out?
As a matter of style, learn to work entirely symbolically, only plugging in numbers at the end. It has many advantages.
In the present case, you could have avoided some arithmetic since g would cancel.